How to Correctly Initialize and Access Elements in a Java Array?

Array Initialization in Java

When attempting to initialize an array as shown below:

int data[] = new int[10]; 
public Array() {
    data[10] = {10,20,30,40,50,60,71,80,90,91};
}

Java compilation may encounter an error. The root of the problem lies in the array initialization line:

data[10] = {10,20,30,40,50,60,71,80,90,91};

This line incorrectly assigns an array to data[10], which can only hold a single element. To correctly initialize an array, two approaches can be considered:

Array Initializer:

int[] data = {10,20,30,40,50,60,71,80,90,91};

In this approach, the array is initialized directly during its declaration.

Manual Initialization:

int[] data;
data = new int[] {10,20,30,40,50,60,71,80,90,91};

Here, the array is first declared, and then a new array is assigned to it using the new keyword.

Note that the correction of the syntax does not resolve all issues. Accessing data[10] remains incorrect in the provided code, as Java arrays have 0-based indices. Attempting to access an element beyond the valid range (from 0 to 9) will throw an ArrayIndexOutOfBoundsException.

The above is the detailed content of How to Correctly Initialize and Access Elements in a Java Array?. For more information, please follow other related articles on the PHP Chinese website!